Write RigidBody / Physics Unit Tests

Summary

There are already unit tests that check some basic cloning / copying functionality, but there are none that test actual physics and transformation behavior. Add a few basic tests to ensure physics works properly.

Analysis

• The basic test layout could be to create a scene, make it current and simulate a certain number of frames with a fixed timestep, similar to the sandbox single-frame step.
• Tests could include:
  • A ball falling down onto a platform.
  • Non-static bodies not depending on parent transform, unless AllowParent was set to true.
  • Probably lots of others, including properties, joints, etc., but keep it short and simple for now.

[Barsonax]

Ah that also explains why I had to use Resharper to actually run the tests. In pathfindax I use the NUnit3TestAdapter nuget package so that you don’t need the extension.

Tested it with the Nunit2 extension and now it works without problems. Still maybe consider adding that nuget package to the test projects? That way ppl won’t have to install the extension.

[ilexp]

Immediate ToDo

• Implement a unit test that checks PickShapes for correct functionality in both point-based and rect-based overloads, as well as both local and global overloads.
  • Make sure the failure case from issue #291 is included and reproducable with the pre-#579 code.